CN111415972A - O L ED display panel - Google Patents
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- CN111415972A CN111415972A CN202010349032.8A CN202010349032A CN111415972A CN 111415972 A CN111415972 A CN 111415972A CN 202010349032 A CN202010349032 A CN 202010349032A CN 111415972 A CN111415972 A CN 111415972A
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/30—Devices specially adapted for multicolour light emission
- H10K59/32—Stacked devices having two or more layers, each emitting at different wavelengths
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/80—Constructional details
- H10K50/86—Arrangements for improving contrast, e.g. preventing reflection of ambient light
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/10—OLED displays
- H10K59/12—Active-matrix OLED [AMOLED] displays
- H10K59/128—Active-matrix OLED [AMOLED] displays comprising two independent displays, e.g. for emitting information from two major sides of the display
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Abstract
The application provides an O L ED display panel, which comprises a transparent substrate, a first display substrate and a second display substrate, wherein the first display substrate is arranged on one side surface of the transparent substrate and comprises first light-emitting units distributed in an array, the second display substrate is arranged on the opposite side surface of the transparent substrate and comprises second light-emitting units distributed in an array, the second light-emitting units are correspondingly positioned at gaps between two adjacent first light-emitting units, and the light emitting directions of the second light-emitting units and the first light-emitting units are consistent.
Description
Technical Field
The application relates to the technical field of display, in particular to an O L ED display panel.
Background
In recent years, the development of Organic light Emitting Diode (O L ED, Organic L light Emitting Diode) display technology has been advanced, and O L ED products have attracted more and more attention and applications due to their advantages of lightness, thinness, fast response, high contrast, flexibility, and the like, and are mainly applied to the display fields of mobile phones, flat panels, televisions, and the like.
With the continuous development of display screens towards higher and higher resolution, the O L ED display panel has a very complicated Array driving (Array) layer, and the reduction size of circuit elements such as thin film transistors and capacitors is limited, so that the pixel density is limited, which is not favorable for the development of the O L ED display panel towards high resolution.
Therefore, the prior art has defects which need to be solved urgently.
Disclosure of Invention
The application provides an O L ED display panel, can solve traditional O L ED display panel pixel density and be unfavorable for the technical problem to the direction development of high resolution.
In order to solve the above problems, the technical solution provided by the present application is as follows:
the application provides an O L ED display panel, includes:
a transparent substrate;
the first display substrate is arranged on one side surface of the transparent substrate and comprises first light-emitting units distributed in an array manner;
the second display substrate is arranged on the surface of the other side opposite to the transparent substrate and comprises second light-emitting units distributed in an array manner;
the second light-emitting units are correspondingly positioned between two adjacent first light-emitting units, and the light-emitting directions of the second light-emitting units and the first light-emitting units are consistent.
In the O L ED display panel of the present application, an orthogonal projection of the first light-emitting unit on the transparent substrate is located between orthogonal projections of two adjacent second light-emitting units on the transparent substrate.
In the O L ED display panel of this application, first display substrate is including being located first array driver layer, first light emitting device layer and the first encapsulation layer that stacks gradually on the transparent basement, second display substrate is including being located second array driver layer, second light emitting device layer and the second encapsulation layer that stacks gradually under the transparent basement.
In the O L ED display panel of the present application, the O L ED display panel further includes a driving chip electrically connected to the first driving circuit on the first array driving layer and the second driving circuit on the second array driving layer, respectively.
In the O L ED display panel of the present application, the first light emitting device layer includes a first anode, a first light emitting layer, and a first cathode sequentially stacked above the first array driving layer, and the second light emitting device layer includes a second anode, a second light emitting layer, and a second cathode sequentially stacked below the second array driving layer.
In the O L ED display panel of the present application, the first anode is a reflective electrode, the first cathode is a translucent electrode, the second anode is a transparent electrode, and the second cathode is a reflective electrode.
In the O L ED display panel of the present application, an orthogonal projection of the first light emitting layer on the transparent substrate is located between orthogonal projections of two adjacent second light emitting layers on the transparent substrate.
In the O L ED display panel of the present application, there is a gap between the orthographic projection of the first light emitting layer on the transparent substrate and the orthographic projection of the second light emitting layer on the transparent substrate, the first array driving layer includes a first signal trace, the second array driving layer includes a second signal trace, and the first signal trace and the second signal trace are both located at the gap.
In the O L ED display panel of the present application, the first signal traces and the second signal traces are disposed in an overlapping manner.
In the O L ED display panel of the present application, the first display substrate includes N-level GOA units, and the second display substrate includes N 'level GOA units, where N and N' are equal and are positive integers;
the first light emitting units and the second light emitting units are distributed at intervals in the row direction, and the nth-level GOA unit on the first display substrate and the nth '-level GOA unit on the second display substrate are driven simultaneously, wherein N is a positive integer which is greater than or equal to 1 and less than or equal to N, N' is a positive integer which is greater than or equal to 1 and less than or equal to N ', and N is equal to N';
alternatively, the first and second electrodes may be,
the row of the first light-emitting units and the row of the second light-emitting units are distributed at intervals in the row direction, the O L ED display panel comprises 2N-level GOA units, the GOA units on the first display substrate are in odd levels, the GOA units on the second display substrate are in even levels, the GOA units on the first display substrate and the GOA units on the second display substrate are alternately driven row by row, and N is a positive integer.
The O L ED display panel has the advantages that the O L ED display substrate array driving layer and the light emitting device layer are respectively manufactured on the two sides of the transparent substrate, so that the double-sided O L ED display panel is obtained, the light emitting directions of the display substrates on the two sides are the same, and therefore the double-sided O L ED display panel emitting light in a single direction is formed, namely the display substrate on one side emits light in a bottom mode, the display substrate on the other side emits light in a top mode, light emitting units on the two display substrates are not overlapped, and the two display substrates are coordinately controlled through a common driving IC, so that the attached O L ED display panel displays a picture with doubled pixel density.
Drawings
The technical solution and other advantages of the present application will become apparent from the detailed description of the embodiments of the present application with reference to the accompanying drawings.
Fig. 1 is a schematic structural diagram of an O L ED display panel according to an embodiment of the present disclosure;
fig. 2 is a schematic diagram of a partial film layer of a display panel according to an embodiment of the present disclosure;
fig. 3 is a schematic structural diagram of a display panel provided in the embodiment of the present application after being bound;
fig. 4 is a schematic diagram of a pixel structure of an O L ED display panel according to an embodiment of the present disclosure;
fig. 5 is a schematic view of a pixel structure of an O L ED display panel according to a second embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In the description of the present application, it is to be understood that the terms "longitudinal," "lateral," "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," and the like are used in the orientation or positional relationship indicated in the drawings, which are based on the orientation or positional relationship shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and therefore should not be considered as limiting the present application. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise. In this application, "/" means "or".
The present application may repeat reference numerals and/or letters in the various examples, which have been repeated for purposes of simplicity and clarity and do not in themselves dictate a relationship between the various embodiments and/or arrangements discussed.
The following description is provided to describe the display panel in detail with reference to specific embodiments.
Referring to fig. 1, which is a schematic structural diagram of an O L ED display panel provided in this embodiment of the present disclosure, an O L ED display panel includes a transparent substrate 10, where the transparent substrate 10 may be a transparent glass substrate or a transparent flexible substrate, a first display substrate 11 disposed on one side surface of the transparent substrate 10, and a second display substrate 12 disposed on the opposite side surface of the transparent substrate 10, where the first display substrate 11 and the second display substrate 12 are respectively attached to the transparent substrate 10 through a transparent adhesive layer, the first display substrate 11 includes first light emitting units 110 distributed in an array, and the second display substrate 12 includes second light emitting units 120 distributed in an array, where the second light emitting units 120 are correspondingly located between two adjacent first light emitting units 110, and light emitting directions of the second light emitting units 120 and the first light emitting units 110 are the same.
Specifically, if the first light emitting unit 110 is a bottom emission type, the second light emitting unit 120 is a top emission type; if the first light emitting unit 110 is of a top emission type, the second light emitting unit 120 is of a bottom emission type.
The orthographic projection of the first light-emitting unit 110 on the transparent substrate 10 is positioned between the orthographic projections of the two adjacent second light-emitting units 120 on the transparent substrate 10. That is, the orthographic projection of the first light emitting unit 110 on the transparent substrate 10 and the orthographic projection of the second light emitting unit 120 on the transparent substrate 10 do not overlap.
The first light emitting unit 110 includes a red light emitting unit, a green light emitting unit, and a blue light emitting unit, and the second light emitting unit 120 includes a red light emitting unit, a green light emitting unit, and a blue light emitting unit. The pixel point sizes of the red light-emitting unit, the green light-emitting unit and the blue light-emitting unit can be the same or different, and the red light-emitting unit, the green light-emitting unit and the blue light-emitting unit can be designed according to actual needs.
The first display substrate 11 includes a first array driving layer 111, a first light emitting device layer 112, and a first encapsulation layer 113 sequentially stacked on the transparent substrate 10. The first array driving layer 111 includes an inorganic stack layer, and a first signal trace and a first driving circuit in the inorganic stack layer. The first light emitting device layer 112 includes a first anode 1121, a first light emitting layer 1122, and a first cathode 1123 sequentially stacked on the first array driving layer 111. The first encapsulation layer 113 includes an inorganic layer, an organic layer, and an inorganic layer, which are stacked, but is not limited to three layers. In addition, an organic stack layer 114 is further disposed on the first array driving layer 111, and the material of the organic stack layer 114 is a transparent material.
The inorganic stack layer includes, but is not limited to, a buffer layer, a gate insulating layer, an interlayer insulating layer, and the like. The first signal trace includes, but is not limited to, a scan line, a data line, and the like. The first driving circuit is electrically connected to the first light emitting device layer 112, and is configured to drive the first light emitting layer 1122 to emit light.
The second display substrate 12 includes a second array driving layer 121, a second light emitting device layer 122, and a second encapsulation layer 123 sequentially stacked under the transparent base 10. The second array driving layer 121 includes an inorganic stack layer, and a second signal trace and a second driving circuit located in the inorganic stack layer. The second light emitting device layer 122 includes a second anode 1221, a second light emitting layer 1222, and a second cathode 1223 sequentially stacked under the second array driving layer 121. The second encapsulation layer 123 includes an inorganic layer, an organic layer, and an inorganic layer, which are stacked, but is not limited to three layers. In addition, an organic stack layer 124 is further disposed on the second array driving layer 121, and the material of the organic stack layer 124 is a transparent material.
The inorganic stack layers on the second array driving layer 121 are the same as those on the first array driving layer 111, and are not described herein again.
The second signal trace includes, but is not limited to, a scan line, a data line, and the like. The second driving circuit is electrically connected to the second light emitting device layer 122 and is configured to drive the second light emitting layer 1222 to emit light.
The light emitting directions of the display substrates on both sides of the transparent substrate 10 are the same, and the display substrates can cooperatively emit light, so that the first light emitting unit 110 on the first display substrate 11 and the second light emitting unit 120 on the second display substrate 12 jointly form a complete pixel, and thus, an ultra high definition O L ED display panel with doubled pixel density is obtained under the condition that the opening density (or pixel density) of a mask plate is not increased and the element density of an array driving layer is not increased.
Fig. 2 is a schematic view of a partial film layer of a display panel according to an embodiment of the present disclosure. In this embodiment, the first light emitting unit 110 is a top light emitting type, and the second light emitting unit 120 is a bottom light emitting type. In this embodiment, since light emitted from the first light-emitting layer 1122 and light emitted from the second light-emitting layer 1222 need to be transmitted through the first cathode 1123 and exit the display panel, the first anode 1121 is a reflective electrode, and the first cathode 1123 is a translucent electrode. Since the second light emitting unit 120 is of a bottom emission type, the second anode 1221 is a transparent electrode, and the second cathode 1223 is a reflective electrode. If the first light emitting unit 110 is a bottom light emitting type and the second light emitting unit 120 is a top light emitting type, the opposite is true, and the description is omitted here.
Further, the reflective electrode may have a single-layer electrode structure having a reflective function, or may have a combined structure of an electrode layer and a reflective layer.
In one embodiment, the material of the reflective electrode is selected from one of silver, molybdenum and silver, molybdenum-silver alloy, but not limited thereto.
In one embodiment, the material of the transparent electrode is made of at least one of ITO and IGZO. Indium Tin Oxide (ITO) and Indium Gallium Zinc Oxide (IGZO) have excellent transparency and conductivity. Of course, this is not a limitation.
In one embodiment, the material of the translucent electrode includes, but is not limited to, one or more alloys of aluminum, silver, magnesium.
In this embodiment, the orthographic projection of the first light-emitting layer 1122 on the transparent substrate 10 is located between the orthographic projections of the two adjacent second light-emitting layers 1222 on the transparent substrate 10. That is, the orthographic projection of the first light-emitting layer 1122 on the transparent substrate 10 does not overlap the orthographic projection of the second light-emitting layer 1222 on the transparent substrate 10. So as not to affect the normal display of the second light emitting layer 1222.
In one embodiment, there is a gap X between the orthographic projection of the first light-emitting layer 1122 on the transparent substrate 10 and the orthographic projection of the second light-emitting layer 1222 on the transparent substrate 10, the first signal traces on the first array driving layer 111 are disposed corresponding to the gap X, and the second signal traces on the second array driving layer 121 are disposed corresponding to the gap X. Therefore, the light emitted from the second light emitting unit 120 by the first signal traces and the second signal traces is prevented as much as possible.
Furthermore, the first signal wiring and the second signal wiring are arranged in an overlapping mode, so that the space occupied by the first signal wiring and the second signal wiring is reduced, and high-density pixel design is facilitated.
Referring to fig. 3, the O L ED display panel further includes a driving chip 13, and the driving chip 13 is bonded to a side surface of the O L ED display panel, wherein the driving chip 13 is electrically connected to the first driving circuit on the first array driving layer 111 and the second driving circuit on the second array driving layer 121, respectively.
The first array driving layer 111 and the second array driving layer 121 of this embodiment are cooperatively controlled by the common driving chip 13, so that the attached O L ED display panel displays a picture with double pixels.
Referring to fig. 4, a schematic view of a pixel structure of an O L ED display panel according to an embodiment of the present disclosure is shown, where the first display substrate includes N scan lines (G1, G2 … … G (N)) and N-level GOA units, one level GOA unit is correspondingly connected to one scan line, and one scan line is correspondingly connected to one row of the first light emitting units 110, the first display substrate further includes M data lines (D1, D2 … … D (M)), each data line is correspondingly connected to one column of the first light emitting units 110, where N and M are positive integers.
The second display substrate includes N ' scan lines (G ' 1, G ' 2 … … G ' (N)) and N ' level GOA units, where one level GOA unit is correspondingly connected to one scan line, and one scan line is correspondingly connected to one row of the second light emitting units 120. The second display substrate further includes M 'data lines (D' 1, D '2 … … D' (M)), each of which is connected to one column of the second light emitting cells 120. Wherein, N 'and M' are both positive integers, N is equal to N ', and M is equal to M'.
The first light emitting units 110 and the second light emitting units 120 are distributed at intervals in the row direction, that is, located on the same row. The N-th-level GOA unit on the first display substrate and the N '-th-level GOA unit on the second display substrate are driven simultaneously, wherein N is a positive integer which is greater than or equal to 1 and less than or equal to N, N' is a positive integer which is greater than or equal to 1 and less than or equal to N ', and N is equal to N'.
Specifically, the O L ED display panel is driven by turning on two gate driving signals simultaneously each time, i.e., turning on a gate driving signal on the first display substrate and turning on a gate driving signal on the second display substrate, for example, when driving the first row of sub-pixels, G1 and G '1 are turned on simultaneously, the first row of sub-pixels will write signals through all of the data lines D1, D' 1, D2, D '2, … D (M), and D' (M), when driving the second row of sub-pixels, G2 and G '2 are turned on simultaneously, the second row of sub-pixels will write signals through all of the data lines D1, D' 1, D2, D '2, … D (M), and D' (M), so that the light emitting units on the two sides of the transparent substrate can cooperatively emit light, so that the first light emitting unit 110 on the first display substrate and the second light emitting unit 120 on the second display substrate form a complete pixel.
Referring to fig. 5, a schematic diagram of a pixel structure of an O L ED display panel according to a second embodiment of the present disclosure is shown, where a row of the first light emitting units 110 and a row of the second light emitting units 120 are spaced apart in a column (data line direction), the O L ED display panel includes 2N-level GOA units, the GOA units on the first display substrate are odd-level (GOA1, GOA3 … … GOA (2N-1)), the GOA units on the second display substrate are even-level (GOA2, GOA4 … … GOA (2N)), and the GOA units on the first display substrate and the GOA units on the second display substrate are alternately driven row by row, where N is a positive integer.
Specifically, the O L ED display panel is driven by turning on a gate driving signal each time, and alternately turning on a gate driving signal on the first display substrate and a gate driving signal on the second display substrate in a progressive scanning process, for example, when a first row of sub-pixels are driven, a GOA1 on the first display substrate is turned on, at this time, the first row of sub-pixels write signals through all data lines D1, D2, … D (M) on the first display substrate, when a second row of sub-pixels are driven, a GOA2 on the second display substrate is turned on, at this time, the second row of sub-pixels write signals through all data lines D ' 1, D ' 2, … D ' (M) on the second display substrate, and so on, so that the light emitting units on the display substrates on both sides of the transparent substrate can cooperatively emit light, and the first light emitting unit 110 on the first display substrate and the second light emitting unit 120 on the second display substrate jointly form a complete pixel.
In summary, the O L ED display panel provided by the present application obtains a double-sided O L ED display panel by performing the processes of the array driving layer, the light emitting device layer, and the like of the O L ED display substrate on both sides of the transparent substrate, wherein the light emitting directions of the display substrates on both sides are the same, so as to form a single-side light emitting double-sided O L ED display panel, that is, the display substrate on one side is bottom emitting, the display substrate on the other side is top emitting, and the light emitting units on the two display substrates are not overlapped, and the two display substrates are coordinately controlled by the common driving IC, so that the attached O L ED display panel displays a picture with doubled pixel density.
In summary, although the present application has been described with reference to the preferred embodiments, the above-described preferred embodiments are not intended to limit the present application, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present application, so that the scope of the present application shall be determined by the appended claims.
Claims (10)
1. An O L ED display panel, comprising:
a transparent substrate;
the first display substrate is arranged on one side surface of the transparent substrate and comprises first light-emitting units distributed in an array manner;
the second display substrate is arranged on the surface of the other side opposite to the transparent substrate and comprises second light-emitting units distributed in an array manner;
the second light-emitting units are correspondingly positioned between two adjacent first light-emitting units, and the light-emitting directions of the second light-emitting units and the first light-emitting units are consistent.
2. The O L ED display panel according to claim 1, wherein an orthogonal projection of the first light-emitting unit on the transparent substrate is located between orthogonal projections of two adjacent second light-emitting units on the transparent substrate.
3. The O L ED display panel of claim 1, wherein the first display substrate comprises a first array driving layer, a first light emitting device layer and a first encapsulation layer sequentially stacked on the transparent substrate, and the second display substrate comprises a second array driving layer, a second light emitting device layer and a second encapsulation layer sequentially stacked under the transparent substrate.
4. The O L ED display panel of claim 3, wherein the O L ED display panel further comprises a driver chip electrically connected to the first driver circuit on the first array driver layer and the second driver circuit on the second array driver layer, respectively.
5. The O L ED display panel of claim 3, wherein the first light emitting device layer comprises a first anode, a first light emitting layer and a first cathode sequentially stacked on the first array driving layer, and the second light emitting device layer comprises a second anode, a second light emitting layer and a second cathode sequentially stacked under the second array driving layer.
6. The O L ED display panel of claim 5, wherein the first anode is a reflective electrode, the first cathode is a semi-transparent electrode, the second anode is a transparent electrode, and the second cathode is a reflective electrode.
7. The O L ED display panel according to claim 5, wherein an orthogonal projection of the first light emitting layer on the transparent substrate is located between orthogonal projections of two adjacent second light emitting layers on the transparent substrate.
8. The O L ED display panel according to claim 7, wherein a gap exists between an orthographic projection of the first light emitting layer on the transparent substrate and an orthographic projection of the second light emitting layer on the transparent substrate, the first array driving layer comprises first signal traces, the second array driving layer comprises second signal traces, and the first signal traces and the second signal traces are both located at the gap.
9. The O L ED display panel of claim 8, wherein the first signal traces and the second signal traces are disposed overlapping.
10. The O L ED display panel of claim 1, wherein the first display substrate comprises N-level GOA cells and the second display substrate comprises N 'level GOA cells, where N and N' are equal and are positive integers;
the first light emitting units and the second light emitting units are distributed at intervals in the row direction, and the nth-level GOA unit on the first display substrate and the nth '-level GOA unit on the second display substrate are driven simultaneously, wherein N is a positive integer which is greater than or equal to 1 and less than or equal to N, N' is a positive integer which is greater than or equal to 1 and less than or equal to N ', and N is equal to N';
alternatively, the first and second electrodes may be,
the row of the first light-emitting units and the row of the second light-emitting units are distributed at intervals in the row direction, the O L ED display panel comprises 2N-level GOA units, the GOA units on the first display substrate are in odd levels, the GOA units on the second display substrate are in even levels, the GOA units on the first display substrate and the GOA units on the second display substrate are alternately driven row by row, and N is a positive integer.
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| CN202010349032.8A CN111415972B (en) | 2020-04-28 | 2020-04-28 | OLED display panel |
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| CN202010349032.8A CN111415972B (en) | 2020-04-28 | 2020-04-28 | OLED display panel |
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| CN117192799A (en) * | 2023-11-06 | 2023-12-08 | Tcl华星光电技术有限公司 | Display module |
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